{"id":1700,"date":"2026-03-26T17:55:23","date_gmt":"2026-03-26T17:55:23","guid":{"rendered":"https:\/\/www.go-diagram.com\/tw\/resolving-many-to-many-relationships-erd-modeling\/"},"modified":"2026-03-26T17:55:23","modified_gmt":"2026-03-26T17:55:23","slug":"resolving-many-to-many-relationships-erd-modeling","status":"publish","type":"post","link":"https:\/\/www.go-diagram.com\/tw\/resolving-many-to-many-relationships-erd-modeling\/","title":{"rendered":"\u89e3\u6c7a\u591a\u5c0d\u591a\u95dc\u4fc2\uff1aERD 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class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img alt=\"Charcoal sketch infographic illustrating how to resolve many-to-many relationships in Entity-Relationship Diagrams using a junction table, showing Students and Courses entities connected through an Enrollments bridge table with foreign keys, composite primary keys, and crow's foot cardinality notation\" decoding=\"async\" src=\"https:\/\/www.go-diagram.com\/wp-content\/uploads\/2026\/03\/resolving-many-to-many-relationships-erd-junction-table-infographic.jpg\"\/><\/figure>\n<\/div>\n<h2>\ud83d\udd0d \u7406\u89e3 ERD \u4e2d\u7684\u57fa\u6578<\/h2>\n<p>\u57fa\u6578\u5b9a\u7fa9\u4e86\u8cc7\u6599\u5eab\u4e2d\u5be6\u9ad4\u4e4b\u9593\u7684\u6578\u503c\u95dc\u4fc2\u3002\u5b83\u8aaa\u660e\u4e86\u4e00\u500b\u5be6\u9ad4\u7684\u5be6\u4f8b\u53ef\u4ee5\u6216\u5fc5\u9808\u8207\u53e6\u4e00\u500b\u5be6\u9ad4\u7684\u591a\u5c11\u500b\u5be6\u4f8b\u76f8\u95dc\u806f\u3002\u5728 ERD \u8868\u793a\u6cd5\u4e2d\uff0c\u9019\u901a\u5e38\u4ee5\u9023\u63a5\u5be6\u9ad4\u7684\u7dda\u689d\u4f86\u8868\u793a\uff0c\u5176\u4e2d\u300c\u9ce5\u722a\u300d\u7b26\u865f\u4ee3\u8868\u300c\u591a\u300d\u7684\u4e00\u65b9\uff0c\u800c\u76f4\u7dda\u6216\u55ae\u500b\u52fe\u865f\u5247\u4ee3\u8868\u300c\u4e00\u300d\u7684\u4e00\u65b9\u3002<\/p>\n<p>\u4e3b\u8981\u6709\u4e09\u7a2e\u57fa\u6578\uff1a<\/p>\n<ul>\n<li><strong>\u4e00\u5c0d\u4e00\uff081:1\uff09\uff1a<\/strong>\u5be6\u9ad4 A \u4e2d\u7684\u55ae\u4e00\u8a18\u9304\u8207\u5be6\u9ad4 B \u4e2d\u7684\u55ae\u4e00\u8a18\u9304\u76f8\u95dc\u806f\u3002\u7bc4\u4f8b\uff1a\u4e00\u500b\u4eba\u53ca\u5176\u8b77\u7167\u3002<\/li>\n<li><strong>\u4e00\u5c0d\u591a\uff081:M\uff09\uff1a<\/strong>\u5be6\u9ad4 A \u4e2d\u7684\u55ae\u4e00\u8a18\u9304\u8207\u5be6\u9ad4 B \u4e2d\u7684\u591a\u500b\u8a18\u9304\u76f8\u95dc\u806f\u3002\u7bc4\u4f8b\uff1a\u4e00\u4f4d\u9867\u5ba2\u4e0b\u591a\u7b46\u8a02\u55ae\u3002<\/li>\n<li><strong>\u591a\u5c0d\u591a\uff08M:N\uff09\uff1a<\/strong>\u5be6\u9ad4 A \u4e2d\u7684\u591a\u500b\u8a18\u9304\u8207\u5be6\u9ad4 B \u4e2d\u7684\u591a\u500b\u8a18\u9304\u76f8\u95dc\u806f\u3002\u7bc4\u4f8b\uff1a\u5b78\u751f\u9078\u4fee\u591a\u9580\u8ab2\u7a0b\uff0c\u800c\u8ab2\u7a0b\u4e2d\u5305\u542b\u591a\u540d\u5b78\u751f\u3002<\/li>\n<\/ul>\n<p>\u96d6\u7136 1:1 \u548c 1:M \u95dc\u4fc2\u5728\u7269\u7406\u8cc7\u6599\u5eab\u7d50\u69cb\u4e2d\u5bb9\u6613\u5be6\u73fe\uff0c\u4f46 M:N \u95dc\u4fc2\u537b\u5e36\u4f86\u7368\u7279\u7684\u6311\u6230\u3002\u95dc\u4fc2\u7406\u8ad6\u6307\u51fa\uff0c\u8cc7\u6599\u8868\u4e2d\u7684\u55ae\u5143\u683c\u61c9\u50c5\u5305\u542b\u539f\u5b50\u503c\u3002\u82e5\u5169\u500b\u8cc7\u6599\u8868\u4e4b\u9593\u5b58\u5728\u76f4\u63a5\u9023\u7d50\uff0c\u4f7f\u5f97 Table A \u4e2d\u7684\u55ae\u4e00\u884c\u7406\u8ad6\u4e0a\u53ef\u53c3\u8003 Table B \u4e2d\u7684\u591a\u884c\uff0c\u9019\u5728\u7269\u7406\u5c64\u9762\u9055\u53cd\u4e86\u6b64\u539f\u5247\u3002<\/p>\n<h2>\ud83d\udeab \u70ba\u4f55\u76f4\u63a5\u7684 M:M \u95dc\u4fc2\u5728\u95dc\u4fc2\u6a21\u578b\u4e2d\u6703\u5931\u6557<\/h2>\n<p>\u7531 E.F. Codd \u5efa\u7acb\u7684\u95dc\u4fc2\u6a21\u578b\uff0c\u4f9d\u8cf4\u65bc\u95dc\u4fc2\uff08\u8cc7\u6599\u8868\uff09\u7684\u6982\u5ff5\uff0c\u5176\u4e2d\u6bcf\u4e00\u6b04\u4ee3\u8868\u4e00\u500b\u7279\u5b9a\u5c6c\u6027\uff0c\u6bcf\u4e00\u5217\u4ee3\u8868\u4e00\u500b\u552f\u4e00\u7684\u5be6\u4f8b\u3002\u5728\u6a19\u6e96\u95dc\u4fc2\u578b\u8cc7\u6599\u5eab\u4e2d\uff0c\u7121\u6cd5\u5efa\u7acb\u76f4\u63a5\u7684\u591a\u5c0d\u591a\u9023\u7d50\uff0c\u4e3b\u8981\u6709\u5169\u500b\u539f\u56e0\uff1a<\/p>\n<ul>\n<li><strong>\u7f3a\u4e4f\u539f\u751f\u652f\u63f4\uff1a<\/strong>\u8cc7\u6599\u5eab\u5f15\u64ce\u4e0d\u5141\u8a31\u5916\u9375\u6b04\u4f4d\u5132\u5b58\u591a\u500b\u503c\u3002\u5916\u9375\u5fc5\u9808\u6307\u5411\u53e6\u4e00\u500b\u8cc7\u6599\u8868\u4e2d\u7684\u55ae\u4e00\u4e3b\u9375\uff0c\u800c\u7121\u6cd5\u6307\u5411\u4e00\u7d44\u9375\u3002<\/li>\n<li><strong>\u63d2\u5165\u8207\u522a\u9664\u7570\u5e38\uff1a<\/strong>\u82e5\u5617\u8a66\u5c07\u591a\u500b ID \u5132\u5b58\u5728\u55ae\u4e00\u55ae\u5143\u683c\u4e2d\uff08\u4f8b\u5982\u300cStudent_ID: 101, 102, 103\u300d\uff09\uff0c\u5c31\u6703\u9055\u53cd\u7b2c\u4e00\u7bc4\u5f0f\uff081NF\uff09\u3002\u9019\u4f7f\u5f97\u67e5\u8a62\u3001\u66f4\u65b0\u548c\u522a\u9664\u7279\u5b9a\u95dc\u4fc2\u5728\u8a08\u7b97\u4e0a\u8b8a\u5f97\u6602\u8cb4\u4e14\u5bb9\u6613\u51fa\u932f\u3002<\/li>\n<\/ul>\n<p>\u56e0\u6b64\uff0c\u70ba\u4e86\u9ad8\u6548\u5132\u5b58\u6b64\u985e\u8cc7\u6599\uff0c\u95dc\u4fc2\u672c\u8eab\u5fc5\u9808\u88ab\u8996\u70ba\u4e00\u500b\u5be6\u9ad4\u3002\u9019\u7a2e\u8f49\u63db\u662f\u89e3\u6c7a\u8907\u96dc\u6027\u7684\u6838\u5fc3\u6280\u8853\u3002<\/p>\n<h2>\ud83e\uddf1 \u6280\u5de7 1\uff1a\u95dc\u806f\u5be6\u9ad4\uff08\u9023\u7d50\u8868\uff09<\/h2>\n<p>\u89e3\u6c7a\u591a\u5c0d\u591a\u95dc\u4fc2\u7684\u6a19\u6e96\u65b9\u6cd5\u662f\u5efa\u7acb\u4e00\u500b\u95dc\u806f\u5be6\u9ad4\uff0c\u901a\u5e38\u7a31\u70ba\u9023\u7d50\u8868\u6216\u6a4b\u63a5\u8868\u3002\u6b64\u8cc7\u6599\u8868\u5728\u7269\u7406\u4e0a\u4f4d\u65bc\u5169\u500b\u4e3b\u8981\u5be6\u9ad4\u4e4b\u9593\uff0c\u4e26\u5c07\u76f4\u63a5\u9023\u7d50\u62c6\u5206\u70ba\u5169\u500b\u4e00\u5c0d\u591a\u95dc\u4fc2\u3002<\/p>\n<p>\u7576\u5f15\u5165\u9023\u7d50\u8868\u6642\uff0c\u539f\u6709\u7684 M:N \u95dc\u4fc2\u6703\u88ab\u5206\u89e3\u70ba\uff1a<\/p>\n<ul>\n<li>\u5be6\u9ad4 A \u8207\u9023\u7d50\u8868\u4e4b\u9593\u7684\u4e00\u5c0d\u591a\u95dc\u4fc2\u3002<\/li>\n<li>\u5be6\u9ad4 B \u8207\u9023\u7d50\u8868\u4e4b\u9593\u7684\u4e00\u5c0d\u591a\u95dc\u4fc2\u3002<\/li>\n<\/ul>\n<p><strong>\u9023\u7d50\u8868\u7684\u7d50\u69cb\uff1a<\/strong><\/p>\n<ul>\n<li><strong>\u5916\u9375\uff1a<\/strong>\u5b83\u5fc5\u9808\u81f3\u5c11\u5305\u542b\u5169\u500b\u5916\u9375\u6b04\u4f4d\u3002\u4e00\u500b\u6307\u5411\u5be6\u9ad4 A \u7684\u4e3b\u9375\uff0c\u53e6\u4e00\u500b\u6307\u5411\u5be6\u9ad4 B \u7684\u4e3b\u9375\u3002<\/li>\n<li><strong>\u8907\u5408\u4e3b\u9375\uff1a<\/strong>\u901a\u5e38\uff0c\u9019\u5169\u500b\u5916\u9375\u7684\u7d44\u5408\u6703\u4f5c\u70ba\u9023\u7d50\u8868\u7684\u4e3b\u9375\u3002\u9019\u78ba\u4fdd\u4e86\u7279\u5b9a\u7684\u4e00\u5c0d\u5be6\u9ad4\u7121\u6cd5\u88ab\u9023\u7d50\u8d85\u904e\u4e00\u6b21\uff0c\u9664\u975e\u8a72\u95dc\u4fc2\u672c\u8eab\u5177\u6709\u591a\u503c\u6027\u3002<\/li>\n<li><strong>\u4ee3\u7406\u9375\uff1a<\/strong> \u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u6703\u5411\u806f\u7d50\u8868\u6dfb\u52a0\u4e00\u500b\u552f\u4e00\u7684\u81ea\u52d5\u905e\u589eID\u3002\u5982\u679c\u95dc\u4fc2\u53ef\u4ee5\u5177\u6709\u5e36\u6709\u4e0d\u540c\u5c6c\u6027\u7684\u591a\u500b\u5be6\u4f8b\uff0c\u9019\u7a2e\u505a\u6cd5\u975e\u5e38\u6709\u7528\uff08\u4f8b\u5982\uff0c\u4e00\u540d\u5b78\u751f\u53ef\u4ee5\u5728\u4e0d\u540c\u5e74\u4efd\u591a\u6b21\u8a3b\u518a\u540c\u4e00\u9580\u8ab2\u7a0b\uff0c\u4e26\u7372\u5f97\u4e0d\u540c\u7684\u6210\u7e3e\uff09\u3002<\/li>\n<\/ul>\n<p><strong>\u7bc4\u4f8b\u60c5\u5883\uff1a<\/strong><\/p>\n<p>\u8003\u616e\u4e00\u500b\u5716\u66f8\u9928\u7cfb\u7d71\u3002\u4e00\u500b<strong>\u66f8\u7c4d<\/strong>\u53ef\u4ee5\u88ab\u8a31\u591a<strong>\u501f\u95b1\u8005<\/strong>\u501f\u95b1\u3002\u4e00\u500b<strong>\u501f\u95b1\u8005<\/strong>\u53ef\u4ee5\u501f\u95b1\u591a\u672c<strong>\u66f8\u7c4d<\/strong>.<\/p>\n<ul>\n<li>\u672a\u89e3\u6c7a\u6642\uff1a\u4f60\u7121\u6cd5\u76f4\u63a5\u5c07\u4e00\u500b\u66f8\u7c4d\u8cc7\u6599\u5217\u9023\u7d50\u5230\u591a\u500b\u501f\u95b1\u8005\u8cc7\u6599\u5217\u3002<\/li>\n<li>\u89e3\u6c7a\u65b9\u6848\uff1a\u5efa\u7acb\u4e00\u500b<strong>\u501f\u95b1\u7d00\u9304<\/strong>\u8cc7\u6599\u8868\u3002<\/li>\n<li>\u9019\u500b<strong>\u501f\u95b1\u7d00\u9304<\/strong>\u5305\u542b<code>\u66f8\u7c4dID<\/code>\u8207<code>\u501f\u95b1\u8005ID<\/code>.<\/li>\n<\/ul>\n<p>\u9019\u7a2e\u7d50\u69cb\u8b93\u8cc7\u6599\u5eab\u80fd\u5920\u7cbe\u78ba\u8ffd\u8e64\u5728\u4efb\u4f55\u7279\u5b9a\u6642\u9593\u9ede\uff0c\u54ea\u4f4d\u501f\u95b1\u8005\u64c1\u6709\u54ea\u672c\u66f8\uff0c\u800c\u7121\u9700\u91cd\u8907\u5132\u5b58\u66f8\u7c4d\u6216\u501f\u95b1\u8005\u8cc7\u6599\u3002<\/p>\n<h2>\ud83d\udcdd \u6280\u5de7 2\uff1a\u8655\u7406\u95dc\u4fc2\u4e0a\u7684\u5c6c\u6027<\/h2>\n<p>ERD \u5efa\u6a21\u4e2d\u4e00\u500b\u95dc\u9375\u5340\u5225\u5728\u65bc\uff0c\u5be6\u9ad4\u4e4b\u9593\u7684\u95dc\u4fc2\u662f\u5426\u5177\u6709\u81ea\u5df1\u7684\u8cc7\u6599\u3002\u5728\u7c21\u55ae\u7684\u9023\u7d50\u4e2d\uff0c\u9023\u7d50\u5b58\u5728\u6216\u4e0d\u5b58\u5728\u3002\u7136\u800c\uff0c\u5728\u8a31\u591a\u73fe\u5be6\u60c5\u5883\u4e2d\uff0c\u95dc\u4fc2\u672c\u8eab\u5177\u6709\u5c6c\u6027\u3002<\/p>\n<p>\u4f8b\u5982\uff0c\u5728\u4e00\u500b<strong>\u5c08\u6848<\/strong>\u8207<strong>\u54e1\u5de5<\/strong> \u60c5\u5883\u4e2d\uff0c\u4e00\u540d\u54e1\u5de5\u53ef\u4ee5\u53c3\u8207\u591a\u500b\u5c08\u6848\uff0c\u800c\u4e00\u500b\u5c08\u6848\u4e5f\u6709\u591a\u540d\u54e1\u5de5\u3002\u4f46\u9019\u985e\u95dc\u4fc2\u53ef\u80fd\u5305\u542b\uff1a<\/p>\n<ul>\n<li><strong>\u89d2\u8272\uff1a<\/strong> \u8a72\u54e1\u5de5\u5728\u6b64\u5c08\u6848\u4e2d\u662f\u958b\u767c\u4eba\u54e1\u3001\u8a2d\u8a08\u5e2b\u9084\u662f\u7d93\u7406\uff1f<\/li>\n<li><strong>\u5206\u914d\u6642\u6578\uff1a<\/strong> \u6bcf\u9031\u5206\u914d\u7d66\u6b64\u5c08\u6848\u7684\u6642\u6578\u662f\u591a\u5c11\uff1f<\/li>\n<li><strong>\u958b\u59cb\u65e5\u671f\uff1a<\/strong> \u6b64\u9805\u6307\u6d3e\u4f55\u6642\u958b\u59cb\uff1f<\/li>\n<\/ul>\n<p>\u5982\u679c\u50c5\u5c07\u95dc\u4fc2\u8996\u70ba\u4e00\u500b\u4e8c\u5143\u65d7\u6a19\uff0c\u5c31\u6703\u907a\u5931\u9019\u4e9b\u95dc\u9375\u8cc7\u6599\u3002\u9023\u7d50\u8868\u683c\u6b63\u662f\u5132\u5b58\u9019\u4e9b\u5c6c\u6027\u7684\u7406\u60f3\u5834\u6240\u3002<\/p>\n<p><strong>\u5be6\u4f5c\u898f\u5247\uff1a<\/strong><\/p>\n<ul>\n<li>\u4e0d\u8981\u5c07\u95dc\u4fc2\u5c6c\u6027\u5132\u5b58\u5728\u7236\u5be6\u9ad4\u4e2d\u3002\u9019\u4e9b\u5c6c\u6027\u65e2\u4e0d\u5c6c\u65bc\u5c08\u6848\u672c\u8eab\uff0c\u4e5f\u4e0d\u5c6c\u65bc\u54e1\u5de5\u672c\u8eab\u3002<\/li>\n<li>\u5c07\u6240\u6709\u8207\u95dc\u4fc2\u76f8\u95dc\u7684\u8cc7\u6599\u90fd\u653e\u7f6e\u5728\u9023\u7d50\u8868\u683c\u4e2d\u3002<\/li>\n<li>\u78ba\u4fdd\u9023\u7d50\u8868\u683c\u5177\u5099\u552f\u4e00\u8b58\u5225\u78bc\uff08\u8907\u5408\u6216\u4ee3\u7406\uff09\uff0c\u4ee5\u4fbf\u5728\u4e0d\u5f71\u97ff\u7236\u5be6\u9ad4\u7684\u60c5\u6cc1\u4e0b\u66f4\u65b0\u9019\u4e9b\u5c6c\u6027\u3002<\/li>\n<\/ul>\n<p>\u6b64\u65b9\u6cd5\u53ef\u78ba\u4fdd\u8cc7\u6599\u7684\u6b63\u5e38\u5316\u3002\u82e5\u4f60\u5c07\u300c<code>\u89d2\u8272<\/code>\u300d\u6b04\u4f4d\u52a0\u5165\u300c<strong>\u54e1\u5de5<\/strong>\u300d\u8868\u683c\uff0c\u7576\u54e1\u5de5\u5728\u4e0d\u540c\u5c08\u6848\u4e2d\u64d4\u4efb\u591a\u7a2e\u89d2\u8272\u6642\uff0c\u5c31\u6703\u7522\u751f\u91cd\u8907\u8cc7\u6599\u3002\u9023\u7d50\u8868\u683c\u53ef\u5c07\u6b64\u5dee\u7570\u9694\u96e2\u3002<\/p>\n<h2>\u2696\ufe0f \u6280\u5de7 3\uff1a\u6b63\u5e38\u5316\u8207\u8cc7\u6599\u5b8c\u6574\u6027<\/h2>\n<p>\u89e3\u6c7a M:N \u95dc\u4fc2\u4e0d\u50c5\u50c5\u662f\u9023\u7d50\u8868\u683c\uff1b\u66f4\u9700\u9075\u5faa\u6b63\u5e38\u5316\u539f\u5247\uff0c\u4ee5\u907f\u514d\u8cc7\u6599\u7570\u5e38\u3002\u7b2c\u4e09\u6b63\u898f\u5316\u5f62\u5f0f\uff083NF\uff09\u662f\u5927\u591a\u6578\u4ea4\u6613\u7cfb\u7d71\u7684\u6a19\u6e96\u76ee\u6a19\u3002<\/p>\n<p><strong>\u7b2c\u4e09\u6b63\u898f\u5316\u5f62\u5f0f\uff083NF\uff09\u7684\u689d\u4ef6\uff1a<\/strong><\/p>\n<ul>\n<li>\u8868\u683c\u5fc5\u9808\u8655\u65bc\u7b2c\u4e8c\u6b63\u898f\u5316\u5f62\u5f0f\uff082NF\uff09\u3002<\/li>\n<li>\u6240\u6709\u975e\u9375\u5c6c\u6027\u5fc5\u9808\u50c5\u4f9d\u8cf4\u65bc\u4e3b\u9375\u3002<\/li>\n<\/ul>\n<p>\u900f\u904e\u5efa\u7acb\u9023\u7d50\u8868\u683c\uff0c\u53ef\u78ba\u4fdd\u95dc\u4fc2\u8cc7\u6599\u4f9d\u8cf4\u65bc\u9023\u7d50\u8868\u683c\u7684\u8907\u5408\u9375\uff0c\u800c\u975e\u55ae\u7368\u7684\u5be6\u9ad4\u9375\u3002\u5982\u6b64\u53ef\u6d88\u9664\u50b3\u905e\u4f9d\u8cf4\u3002<\/p>\n<p><strong>\u53c3\u8003\u5b8c\u6574\u6027\uff1a<\/strong><\/p>\n<p>\u9023\u7d50\u8868\u683c\u4e2d\u7684\u5916\u9375\u7d04\u675f\u81f3\u95dc\u91cd\u8981\uff0c\u5b83\u5011\u5f37\u5236\u57f7\u884c\u4ee5\u4e0b\u898f\u5247\uff1a<\/p>\n<ul>\n<li>\u300c<code>\u66f8\u7c4d\u7de8\u865f<\/code>\u300d\u5fc5\u9808\u5b58\u5728\u65bc\u300c<strong>\u66f8\u7c4d<\/strong>\u300d\u8868\u683c\u4e2d\u3002<\/li>\n<li>A <code>\u8b80\u8005\u7de8\u865f<\/code>\u5728\u501f\u95b1\u8a18\u9304\u4e2d\u5fc5\u9808\u5b58\u5728\u65bc <strong>\u8b80\u8005<\/strong> \u8868\u4e2d\u3002<\/li>\n<\/ul>\n<p>\u9019\u53ef\u9632\u6b62\u5b64\u7acb\u8a18\u9304\u7684\u7522\u751f\u3002\u60a8\u7121\u6cd5\u70ba\u76ee\u9304\u4e2d\u4e0d\u5b58\u5728\u7684\u66f8\u7c4d\u8a18\u9304\u501f\u95b1\u4e8b\u4ef6\u3002\u8cc7\u6599\u5eab\u5f15\u64ce\u900f\u904e\u5728\u522a\u9664\u6642\u4f7f\u7528 <code>\u7d1a\u806f<\/code> \u6216 <code>\u9650\u5236<\/code> \u64cd\u4f5c\u4f86\u5f37\u5236\u57f7\u884c\u3002<\/p>\n<h2>\ud83d\udcca \u95dc\u4fc2\u985e\u578b\u6bd4\u8f03<\/h2>\n<p>\u5c07\u4e0d\u540c\u95dc\u4fc2\u985e\u578b\u7684\u5dee\u7570\u53ef\u8996\u5316\uff0c\u6709\u52a9\u65bc\u9078\u64c7\u6b63\u78ba\u7684\u5efa\u6a21\u7b56\u7565\u3002\u4e0b\u8868\u7e3d\u7d50\u4e86\u7d50\u69cb\u9700\u6c42\u8207\u5be6\u4f5c\u8907\u96dc\u5ea6\u3002<\/p>\n<table>\n<thead>\n<tr>\n<th>\u95dc\u4fc2\u985e\u578b<\/th>\n<th>\u5be6\u969b\u5be6\u4f5c<\/th>\n<th>\u4e3b\u9375\u4f4d\u7f6e<\/th>\n<th>\u8907\u96dc\u5ea6<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u4e00\u5c0d\u4e00 (1:1)<\/td>\n<td>\u5176\u4e2d\u4e00\u5f35\u8868\u7684\u5916\u9375<\/td>\n<td>\u4efb\u4e00\u5f35\u8868<\/td>\n<td>\u4f4e<\/td>\n<\/tr>\n<tr>\n<td>\u4e00\u5c0d\u591a (1:M)<\/td>\n<td>\u300c\u591a\u300d\u7aef\u8868\u4e2d\u7684\u5916\u9375<\/td>\n<td>\u4e3b\u8868<\/td>\n<td>\u4e2d\u7b49<\/td>\n<\/tr>\n<tr>\n<td>\u591a\u5c0d\u591a (M:N)<\/td>\n<td>\u7368\u7acb\u7684\u95dc\u806f\u8868<\/td>\n<td>\u95dc\u806f\u8868\uff08\u8907\u5408\uff09<\/td>\n<td>\u9ad8<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u5982\u6240\u793a\uff0cM:N \u95dc\u4fc2\u9700\u8981\u6700\u591a\u7684\u7d50\u69cb\u958b\u92b7\u3002\u7136\u800c\uff0c\u9019\u7a2e\u958b\u92b7\u5c0d\u65bc\u8cc7\u6599\u5b8c\u6574\u6027\u662f\u5fc5\u8981\u7684\u3002\u67e5\u8a62\u6642\u984d\u5916\u7684\u9023\u63a5\u6210\u672c\uff0c\u901a\u5e38\u9060\u4f4e\u65bc\u56e0\u5efa\u6a21\u4e0d\u4f73\u6240\u5c0e\u81f4\u7684\u8cc7\u6599\u4e0d\u4e00\u81f4\u6240\u5e36\u4f86\u7684\u4ee3\u50f9\u3002<\/p>\n<h2>\ud83d\ude80 \u6027\u80fd\u8003\u91cf<\/h2>\n<p>\u5f15\u5165\u95dc\u806f\u8868\u6703\u70ba\u60a8\u7684\u67e5\u8a62\u589e\u52a0\u4e00\u5c64\u9593\u63a5\u6027\u3002\u5728\u6aa2\u7d22\u8cc7\u6599\u6642\uff0c\u60a8\u5fc5\u9808\u9023\u63a5\u4e09\u500b\u8868\u683c\uff0c\u800c\u4e0d\u662f\u5169\u500b\u3002\u5728\u9ad8\u6d41\u91cf\u7cfb\u7d71\u4e2d\uff0c\u82e5\u672a\u59a5\u5584\u7ba1\u7406\uff0c\u9019\u53ef\u80fd\u6703\u5f71\u97ff\u6548\u80fd\u3002<\/p>\n<ul>\n<li><strong>\u7d22\u5f15\uff1a<\/strong>\u95dc\u806f\u8868\u4e2d\u7684\u6bcf\u500b\u5916\u9375\u90fd\u61c9\u5efa\u7acb\u7d22\u5f15\u3002\u9019\u53ef\u8b93\u8cc7\u6599\u5eab\u5f15\u64ce\u5feb\u901f\u5b9a\u4f4d\u7279\u5b9a\u5be6\u9ad4\u7684\u8cc7\u6599\u5217\uff0c\u800c\u7121\u9700\u6383\u63cf\u6574\u500b\u95dc\u806f\u8868\u3002<\/li>\n<li><strong>\u8907\u5408\u7d22\u5f15\uff1a<\/strong> \u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u5728\u5169\u500b\u5916\u9375\u7684\u7d44\u5408\u4e0a\u5efa\u7acb\u7d22\u5f15\uff0c\u6bd4\u5206\u5225\u5efa\u7acb\u7d22\u5f15\u66f4\u6709\u6548\u7387\u3002\u9019\u53ef\u652f\u63f4\u540c\u6642\u6839\u64da\u5169\u500b\u5be6\u9ad4\u9032\u884c\u7be9\u9078\u7684\u67e5\u8a62\u3002<\/li>\n<li><strong>\u8b80\u53d6\u8207\u5beb\u5165\uff1a<\/strong> \u82e5\u95dc\u4fc2\u662f\u52d5\u614b\u7684\uff0c\u95dc\u806f\u8868\u901a\u5e38\u4ee5\u5beb\u5165\u70ba\u4e3b\u3002\u5728\u7522\u751f\u5831\u8868\u6642\uff0c\u5247\u4ee5\u8b80\u53d6\u70ba\u4e3b\u3002\u8acb\u78ba\u4fdd\u60a8\u7684\u7d22\u5f15\u7b56\u7565\u80fd\u652f\u63f4\u61c9\u7528\u7a0b\u5f0f\u7684\u4e3b\u8981\u64cd\u4f5c\u6a21\u5f0f\u3002<\/li>\n<\/ul>\n<h2>\u26a0\ufe0f \u5e38\u898b\u9677\u9631\u8207\u89e3\u6c7a\u65b9\u6848<\/h2>\n<p>\u5373\u4f7f\u7d93\u9a57\u8c50\u5bcc\u7684\u5efa\u6a21\u4eba\u54e1\u5728\u8655\u7406\u57fa\u6578\u6642\u4e5f\u6703\u72af\u932f\u3002\u4e86\u89e3\u5e38\u898b\u932f\u8aa4\u53ef\u5927\u5e45\u7bc0\u7701\u65e5\u5f8c\u91cd\u69cb\u7684\u6642\u9593\u3002<\/p>\n<h3>1. \u300c\u55ae\u6b04\u4f4d\u300d\u932f\u8aa4<\/h3>\n<p>\u8a66\u5716\u4f7f\u7528\u9017\u865f\u5206\u9694\u7684\u503c\uff08\u4f8b\u5982\u300c1, 2, 3\u300d\uff09\u5c07\u591a\u500bID\u5132\u5b58\u5728\u55ae\u4e00\u6b04\u4f4d\u4e2d\u3002\u9019\u9055\u53cd\u4e86\u8cc7\u6599\u5eab\u539f\u5247\uff0c\u4e14\u5728\u6c92\u6709\u5b57\u4e32\u89e3\u6790\u51fd\u6578\u7684\u60c5\u6cc1\u4e0b\u7121\u6cd5\u9032\u884c\u67e5\u8a62\u3002\u8acb\u59cb\u7d42\u70ba\u6bcf\u500b\u95dc\u4fc2\u5be6\u4f8b\u4f7f\u7528\u7368\u7acb\u7684\u8cc7\u6599\u5217\u3002<\/p>\n<h3>2. \u91cd\u8907\u7684\u5c6c\u6027<\/h3>\n<p>\u5728\u6c92\u6709\u5fc5\u8981\u7684\u60c5\u6cc1\u4e0b\uff0c\u5c07\u7236\u5be6\u9ad4\u7684\u5c6c\u6027\u8907\u88fd\u5230\u95dc\u806f\u8868\u4e2d\u3002\u82e5\u5c6c\u6027\u5c6c\u65bc\u5be6\u9ad4\u672c\u8eab\uff08\u4f8b\u5982\u5b78\u751f\u7684\u59d3\u540d\uff09\uff0c\u5247\u61c9\u653e\u5728\u5b78\u751f\u8cc7\u6599\u8868\u4e2d\uff0c\u800c\u975e\u8a3b\u518a\u8cc7\u6599\u8868\u3002\u50c5\u653e\u5165\u63cf\u8ff0\u9023\u7d50\u672c\u8eab\u7684\u8cc7\u6599\u3002<\/p>\n<h3>3. \u5ffd\u7565\u53ef\u7a7a\u6027<\/h3>\n<p>\u5728\u61c9\u70ba\u5f37\u5236\u6027\u95dc\u4fc2\u6642\uff0c\u5c07\u5916\u9375\u5b9a\u7fa9\u70ba\u53ef\u7a7a\u3002\u82e5\u95dc\u4fc2\u70ba\u5f37\u5236\u6027\uff08\u4f8b\u5982\u8a02\u55ae\u5fc5\u9808\u6709\u5ba2\u6236\uff09\uff0c\u5247\u5916\u9375\u4e0d\u61c9\u5141\u8a31\u7a7a\u503c\u3002\u9019\u53ef\u5728\u8cc7\u6599\u5eab\u5c64\u7d1a\u5f37\u5236\u57f7\u884c\u696d\u52d9\u898f\u5247\u3002<\/p>\n<h3>4. \u905e\u8ff4\u5f15\u7528<\/h3>\n<p>\u4e0d\u5fc5\u8981\u5730\u5efa\u7acb\u5f15\u7528\u81ea\u8eab\u7684\u95dc\u806f\u8868\u3002\u8acb\u78ba\u4fdd\u95dc\u806f\u8868\u50c5\u9023\u7d50\u95dc\u4fc2\u4e2d\u6d89\u53ca\u7684\u5169\u500b\u4e0d\u540c\u5be6\u9ad4\u3002\u907f\u514d\u5efa\u7acb\u7121\u529f\u80fd\u6027\u7528\u9014\u7684\u5faa\u74b0\u3002<\/p>\n<h2>\ud83c\udfa8 \u8996\u89ba\u5316\u5448\u73fe\u7684\u6700\u4f73\u5be6\u52d9<\/h2>\n<p>\u5728\u8a18\u9304\u60a8\u7684\u5be6\u9ad4\u95dc\u4fc2\u5716\uff08ERD\uff09\u6642\uff0c\u6e05\u6670\u5ea6\u81f3\u95dc\u91cd\u8981\u3002\u8996\u89ba\u5316\u5448\u73fe\u61c9\u80fd\u7acb\u5373\u8b93\u4efb\u4f55\u95b1\u8b80\u5716\u8868\u7684\u4eba\u7406\u89e3\u5df2\u89e3\u6c7a\u7684\u7d50\u69cb\u3002<\/p>\n<ul>\n<li><strong>\u6a19\u793a\u95dc\u806f\u8868\uff1a<\/strong>\u4ee5\u63cf\u8ff0\u6027\u540d\u7a31\u547d\u540d\u8868\u683c\u3002\u4e0d\u8981\u4f7f\u7528\u300cTable3\u300d\uff0c\u800c\u61c9\u4f7f\u7528\u300cStudent_Course_Enrollment\u300d\u3002<\/li>\n<li><strong>\u6a19\u793a\u57fa\u6578\uff1a<\/strong>\u660e\u78ba\u6a19\u793a\u9023\u63a5\u95dc\u806f\u8868\u8207\u7236\u5be6\u9ad4\u7684\u7dda\u689d\u3002\u5728\u95dc\u806f\u8868\u5074\u4f7f\u7528\u70cf\u9d09\u8173\u7b26\u865f\uff0c\u5f9e\u7236\u5be6\u9ad4\u7684\u89d2\u5ea6\u986f\u793a\u300c\u591a\u300d\u7684\u95dc\u4fc2\u3002<\/li>\n<li><strong>\u986f\u793a\u5c6c\u6027\uff1a<\/strong> 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